170 F. Stoliczka — Notes- on terrestrial MoHusca. [No. 2, 



Indian specimens. The denticulations near the suture are generally 

 distinct, but in large specimens they often become almost obsolete. 

 I doubt even that Pfeiffer's E. Pirriei is anything more than a 

 large bicolor. The short stout form called by Martens, (Ost. Asiat. 

 Moll. p. 384), var. abbreviate/, I have obtained at Singapore ; it has 

 a thin, almost hyaline structure, but the whole character is, no doubt, 

 that of B. bicolor. 



The animal has a long body, laterally strongly compressed, pos- 

 teriorly shortened, though on the whole a little more produced than 

 in Streptaxis, more or less distinctly yellowish ; on the head reddish ; 

 pedicles long, slightly thickened at the end, their external skin is 

 yellow, but the internal eye-bearing peduncles are vermilion, eyes 

 very small ; tentacles small, pale reddish ; mantle deep red, and so is 

 also the whole of the internal lining of the shell which exhibits 

 the same, deeper, or brighter red colour as soon as the animal 

 moves about. When retracted only the median whorls appear as 

 deep red. Boiling water changes in a moment the red colour to a 

 greenish yellow, spirits of wine does it only gradually. The lateral 

 line of the foot is rather distinct. 



The mantle is only slightly swollen on either sid'e of the pulmo- 

 nary opening, rarely produced into a distinct lobe. The internal 

 anatomy exactly corresponds with that of Streptaxis. The pulmo- 

 nary cavity extends over the two last whorls when the animal creeps 

 about; the distance can be well calculated by the position of 

 the heart which lies at the base of the pulmonary cavity. The uterus 

 consists of more deeply incised lobes than in Streptaxis. No jaw 

 has been observed. The radula is very long, the sides curved up 

 like a sheath of a bambd leaf. There are between 80 and 90 trans- 

 verse series of teeth, arranged in a moderate curve. The centre 

 tooth is short, sharply pointed with a rapidly widened base. The 

 adjoining and following teeth are longer, slightly curved, sharply 

 pointed and with a blunt knob near their bases ; their size gradually 

 decreases as they proceed outward. There are only 1 9 teeth in each 

 transverse series (9 — 1 — 9). 



The animal of Iluttonella bicolor lives generally hidden under old 

 wood, stones, and between damp gravel, particularly near the 

 edges of tanks. Its movements are rather rapid. It is spread almost 



